Who knows how to do this I TRULY NEED HELP

Aline has a slope of 1/4 and passes through point (0.4,-1/2). what is the value of the y-intercept?

The variable in a relation who’s value depends on the value of the independent variable is called what?

Mr. brettler is hanging up a 5-foot tall rectangular welcome sign in the gym. he has drawn a sketch on a coordinate grid. he has the lower vertices of the sign at (9, –3) and (–6, –3). where would the upper vertices be on the grid?